\subsection{Usability Requirements}

%\paragraph{UsR001}
\subsubsection{UsR1}\label{UsR1}
\begin{description}
  \item [Statement]
    \textnormal{The system shall provide a demonstration, which explains a standard search query step by step.}
  \item [Priority] \textnormal{A}
\end{description}

\subsubsection{UsR2}\label{UsR2}
\begin{description}
  \item [Statement]
    \textnormal{The system shall provide a "About"- page, which answers Frenquently Asked Questions.}
  \item [Priority] \textnormal{A}
\end{description}

\subsubsection{UsR3}\label{UsR3}
\begin{description}
  \item [Statement]
    \textnormal{The system shall provide details about the ongoing search, including elapsed search-time a brief description of the awaited interface.}
  \item [Priority] \textnormal{B}
\end{description}

\subsubsection{UsR4}\label{UsR4}
\begin{description}
  \item [Statement]
    \textnormal{The user shall be able to understand and handle the system after a four-hour workshop, held by a developer or advanced user.}
  \item [Priority] \textnormal{A}
\end{description}

\subsubsection{UsR5}\label{UsR5}
\begin{description}
  \item [Statement]
    \textnormal{The images provided for each compound shall be in a resolution, that allows zooming up to a scale of twice its size without losing quality.}
  \item [Priority] \textnormal{C}
\end{description}

